Originally Posted by 1SevenZero
I've come to the conclusion I'm going to set up a light tarp like a small tent. This way I can keep my hood atleast partially unzipped.
Yeah, that will help. How damp is your hood of your bag? On multiday trips with wet weather I've had my bag get progressively wetter. It's somewhat unpleasant, but if it's not too cold and you have a synthetic bag it's not a problem. In cold weather a wet bag could be bad... The flip side is that when it's really cold all the condensation just freezes on the bivy and it's pretty easy to keep the gear dry.
Personally, I'd just deal with the damp bag rather than carry the extra weight of a tarp etc. If you can rig a little hood between some trees that might do the trick. Some bivy sacks have built-in hoods - I don't know if they're meant to stay open in the rain though.
Yeah, there's condensation in the bag when it's zipped tight in a storm, but better than being open to the rain!